402829380 has 36 divisors (see below), whose sum is σ = 1221916332. Its totient is φ = 107421120.

The previous prime is 402829379. The next prime is 402829391. The reversal of 402829380 is 83928204.

It can be written as a sum of positive squares in 2 ways, for example, as 310323456 + 92505924 = 17616^2 + 9618^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1118791 + ... + 1119150.

Almost surely, 2^402829380 is an apocalyptic number.

It is an amenable number.

402829380 is an abundant number, since it is smaller than the sum of its proper divisors (819086952).

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

402829380 is a wasteful number, since it uses less digits than its factorization.

402829380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237956 (or 2237951 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 402829380 is about 20070.6098562052. The cubic root of 402829380 is about 738.5394737958.

The spelling of 402829380 in words is "four hundred two million, eight hundred twenty-nine thousand, three hundred eighty".