401549136 has 80 divisors (see below), whose sum is σ = 1066997184. Its totient is φ = 130056192.

The previous prime is 401549119. The next prime is 401549143. The reversal of 401549136 is 631945104.

It is a super-2 number, since 2×401549136² = 322483417244692992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401549097 and 401549106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 530070 + ... + 530826.

Almost surely, 2^401549136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401549136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (533498592).

401549136 is an abundant number, since it is smaller than the sum of its proper divisors (665448048).

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

401549136 is a wasteful number, since it uses less digits than its factorization.

401549136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068 (or 1062 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 401549136 is about 20038.6909752109. The cubic root of 401549136 is about 737.7562520803.

The spelling of 401549136 in words is "four hundred one million, five hundred forty-nine thousand, one hundred thirty-six".