402149924 has 12 divisors (see below), whose sum is σ = 767740848. Its totient is φ = 182795400.

The previous prime is 402149921. The next prime is 402149947. The reversal of 402149924 is 429941204.

It is a happy number.

It is a super-2 number, since 2×402149924² = 323449122746411552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402149921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4569842 + ... + 4569929.

It is an arithmetic number, because the mean of its divisors is an integer number (63978404).

Almost surely, 2^402149924 is an apocalyptic number.

402149924 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

402149924 is a deficient number, since it is larger than the sum of its proper divisors (365590924).

402149924 is a wasteful number, since it uses less digits than its factorization.

402149924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9139786 (or 9139784 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 402149924 is about 20053.6760719824. The cubic root of 402149924 is about 738.1240063553.

The spelling of 402149924 in words is "four hundred two million, one hundred forty-nine thousand, nine hundred twenty-four".