402031000 has 128 divisors (see below), whose sum is σ = 1090252800. Its totient is φ = 135907200.

The previous prime is 402030983. The next prime is 402031027. The reversal of 402031000 is 130204.

It is a super-2 number, since 2×402031000² = 323257849922000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 552637 + ... + 553363.

It is an arithmetic number, because the mean of its divisors is an integer number (8517600).

Almost surely, 2^402031000 is an apocalyptic number.

402031000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402031000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (545126400).

402031000 is an abundant number, since it is smaller than the sum of its proper divisors (688221800).

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

402031000 is a wasteful number, since it uses less digits than its factorization.

402031000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 402031000 is about 20050.7107105958. The cubic root of 402031000 is about 738.0512397009.

Adding to 402031000 its reverse (130204), we get a palindrome (402161204).

The spelling of 402031000 in words is "four hundred two million, thirty-one thousand".