402457949188 has 12 divisors (see below), whose sum is σ = 704457503260. Its totient is φ = 201184376832.

The previous prime is 402457949147. The next prime is 402457949189. The reversal of 402457949188 is 881949754204.

It can be written as a sum of positive squares in 2 ways, for example, as 68318458884 + 334139490304 = 261378^2 + 578048^2 .

It is a super-2 number, since 2×402457949188² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402457949189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11129133 + ... + 11165236.

Almost surely, 2^402457949188 is an apocalyptic number.

It is an amenable number.

402457949188 is a deficient number, since it is larger than the sum of its proper divisors (301999554072).

402457949188 is a wasteful number, since it uses less digits than its factorization.

402457949188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22298886 (or 22298884 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 61.

The spelling of 402457949188 in words is "four hundred two billion, four hundred fifty-seven million, nine hundred forty-nine thousand, one hundred eighty-eight".