402633040 has 40 divisors (see below), whose sum is σ = 939189888. Its totient is φ = 160525440.

The previous prime is 402633019. The next prime is 402633041. The reversal of 402633040 is 40336204.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×402633040² = 324226729799283200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402633041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16789 + ... + 32971.

Almost surely, 2^402633040 is an apocalyptic number.

402633040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402633040 is an abundant number, since it is smaller than the sum of its proper divisors (536556848).

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

402633040 is a wasteful number, since it uses less digits than its factorization.

402633040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16507 (or 16501 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 402633040 is about 20065.7180285182. The cubic root of 402633040 is about 738.4194656630.

Adding to 402633040 its reverse (40336204), we get a palindrome (442969244).

The spelling of 402633040 in words is "four hundred two million, six hundred thirty-three thousand, forty".