402167720 has 32 divisors (see below), whose sum is σ = 924134400. Its totient is φ = 157443648.

The previous prime is 402167687. The next prime is 402167783. The reversal of 402167720 is 27761204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105080 + ... + 108839.

It is an arithmetic number, because the mean of its divisors is an integer number (28879200).

Almost surely, 2^402167720 is an apocalyptic number.

402167720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402167720 is an abundant number, since it is smaller than the sum of its proper divisors (521966680).

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

402167720 is a wasteful number, since it uses less digits than its factorization.

402167720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213977 (or 213973 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 402167720 is about 20054.1197762455. The cubic root of 402167720 is about 738.1348940535.

The spelling of 402167720 in words is "four hundred two million, one hundred sixty-seven thousand, seven hundred twenty".