400402124 has 48 divisors (see below), whose sum is σ = 775084800. Its totient is φ = 180138816.

The previous prime is 400402103. The next prime is 400402127. The reversal of 400402124 is 421204004.

It is a super-2 number, since 2×400402124² = 320643721807422752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400402127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273707 + ... + 275165.

It is an arithmetic number, because the mean of its divisors is an integer number (16147600).

Almost surely, 2^400402124 is an apocalyptic number.

It is an amenable number.

400402124 is a deficient number, since it is larger than the sum of its proper divisors (374682676).

400402124 is a wasteful number, since it uses less digits than its factorization.

400402124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662 (or 1660 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 400402124 is about 20010.0505746487. The cubic root of 400402124 is about 737.0531232822.

Adding to 400402124 its reverse (421204004), we get a palindrome (821606128).

The spelling of 400402124 in words is "four hundred million, four hundred two thousand, one hundred twenty-four".