402071556 has 96 divisors (see below), whose sum is σ = 1052835840. Its totient is φ = 118761984.

The previous prime is 402071531. The next prime is 402071561. The reversal of 402071556 is 655170204.

It is a super-2 number, since 2×402071556² = 323323072288522272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 313725 + ... + 315003.

It is an arithmetic number, because the mean of its divisors is an integer number (10967040).

Almost surely, 2^402071556 is an apocalyptic number.

402071556 is a gapful number since it is divisible by the number (46) 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 402071556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526417920).

402071556 is an abundant number, since it is smaller than the sum of its proper divisors (650764284).

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

402071556 is a wasteful number, since it uses less digits than its factorization.

402071556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393 (or 1391 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 402071556 is about 20051.7220208141. The cubic root of 402071556 is about 738.0760565265.

The spelling of 402071556 in words is "four hundred two million, seventy-one thousand, five hundred fifty-six".