401620560 has 160 divisors (see below), whose sum is σ = 1368662400. Its totient is φ = 96614400.

The previous prime is 401620519. The next prime is 401620573. The reversal of 401620560 is 65026104.

401620560 = T₄₈₁ + T₄₈₂ + ... + T₁₃₆₀.

It is a super-2 number, since 2×401620560² = 322598148429427200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 401620560.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 392850 + ... + 393870.

It is an arithmetic number, because the mean of its divisors is an integer number (8554140).

Almost surely, 2^401620560 is an apocalyptic number.

401620560 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401620560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (684331200).

401620560 is an abundant number, since it is smaller than the sum of its proper divisors (967041840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401620560 is a wasteful number, since it uses less digits than its factorization.

401620560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197 (or 1191 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 401620560 is about 20040.4730483090. The cubic root of 401620560 is about 737.7999913340.

Adding to 401620560 its reverse (65026104), we get a palindrome (466646664).

The spelling of 401620560 in words is "four hundred one million, six hundred twenty thousand, five hundred sixty".