401499729 has 24 divisors (see below), whose sum is σ = 595314720. Its totient is φ = 260612352.

The previous prime is 401499689. The next prime is 401499733. The reversal of 401499729 is 927994104.

It is a happy number.

It is not a de Polignac number, because 401499729 - 2²⁸ = 133064273 is a prime.

It is a super-2 number, since 2×401499729² = 322404064774146882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401499739) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 135142 + ... + 138080.

It is an arithmetic number, because the mean of its divisors is an integer number (24804780).

Almost surely, 2^401499729 is an apocalyptic number.

It is an amenable number.

401499729 is a deficient number, since it is larger than the sum of its proper divisors (193814991).

401499729 is a wasteful number, since it uses less digits than its factorization.

401499729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3341 (or 3338 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 401499729 is about 20037.4581471802. The cubic root of 401499729 is about 737.7259927546.

The spelling of 401499729 in words is "four hundred one million, four hundred ninety-nine thousand, seven hundred twenty-nine".