402061880 has 64 divisors (see below), whose sum is σ = 989146080. Its totient is φ = 145868800.

The previous prime is 402061871. The next prime is 402061901. The reversal of 402061880 is 88160204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270740 + ... + 272220.

Almost surely, 2^402061880 is an apocalyptic number.

402061880 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 402061880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (494573040).

402061880 is an abundant number, since it is smaller than the sum of its proper divisors (587084200).

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

402061880 is a wasteful number, since it uses less digits than its factorization.

402061880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120 (or 2116 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 402061880 is about 20051.4807433267. The cubic root of 402061880 is about 738.0701357883.

The spelling of 402061880 in words is "four hundred two million, sixty-one thousand, eight hundred eighty".