402582279840 has 192 divisors, whose sum is σ = 1366030987776. Its totient is φ = 99071926272.

The previous prime is 402582279833. The next prime is 402582279863. The reversal of 402582279840 is 48972285204.

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, 40386537 + ... + 40396503.

It is an arithmetic number, because the mean of its divisors is an integer number (7114744728).

Almost surely, 2^402582279840 is an apocalyptic number.

402582279840 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 402582279840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (683015493888).

402582279840 is an abundant number, since it is smaller than the sum of its proper divisors (963448707936).

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

402582279840 is a wasteful number, since it uses less digits than its factorization.

402582279840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16471 (or 16463 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 51.

The spelling of 402582279840 in words is "four hundred two billion, five hundred eighty-two million, two hundred seventy-nine thousand, eight hundred forty".