402834780 has 72 divisors (see below), whose sum is σ = 1230107424. Its totient is φ = 106704000.

The previous prime is 402834749. The next prime is 402834781. The reversal of 402834780 is 87438204.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402834781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19770 + ... + 34590.

Almost surely, 2^402834780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402834780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (615053712).

402834780 is an abundant number, since it is smaller than the sum of its proper divisors (827272644).

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

402834780 is a wasteful number, since it uses less digits than its factorization.

402834780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14987 (or 14982 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 402834780 is about 20070.7443808146. The cubic root of 402834780 is about 738.5427738658.

The spelling of 402834780 in words is "four hundred two million, eight hundred thirty-four thousand, seven hundred eighty".