402031040 has 28 divisors (see below), whose sum is σ = 957337176. Its totient is φ = 160812288.

The previous prime is 402031027. The next prime is 402031043. The reversal of 402031040 is 40130204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402031043) 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, 627854 + ... + 628493.

Almost surely, 2^402031040 is an apocalyptic number.

402031040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402031040 is an abundant number, since it is smaller than the sum of its proper divisors (555306136).

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

402031040 is a wasteful number, since it uses less digits than its factorization.

402031040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256364 (or 1256354 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 402031040 is about 20050.7117080666. The cubic root of 402031040 is about 738.0512641783.

Adding to 402031040 its reverse (40130204), we get a palindrome (442161244).

The spelling of 402031040 in words is "four hundred two million, thirty-one thousand, forty".