401620544 has 28 divisors (see below), whose sum is σ = 858272604. Its totient is φ = 185362944.

The previous prime is 401620519. The next prime is 401620573. The reversal of 401620544 is 445026104.

It can be written as a sum of positive squares in 2 ways, for example, as 154753600 + 246866944 = 12440^2 + 15712^2 .

It is a super-2 number, since 2×401620544² = 322598122725711872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240527 + ... + 242190.

It is an arithmetic number, because the mean of its divisors is an integer number (30652593).

Almost surely, 2^401620544 is an apocalyptic number.

It is an amenable number.

401620544 is an abundant number, since it is smaller than the sum of its proper divisors (456652060).

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

401620544 is a wasteful number, since it uses less digits than its factorization.

401620544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482742 (or 482732 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 401620544 is about 20040.4726491168. The cubic root of 401620544 is about 737.7999815363.

Adding to 401620544 its reverse (445026104), we get a palindrome (846646648).

The spelling of 401620544 in words is "four hundred one million, six hundred twenty thousand, five hundred forty-four".