402740860 has 12 divisors (see below), whose sum is σ = 845755848. Its totient is φ = 161096336.

The previous prime is 402740851. The next prime is 402740867. The reversal of 402740860 is 68047204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402740867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10068502 + ... + 10068541.

It is an arithmetic number, because the mean of its divisors is an integer number (70479654).

Almost surely, 2^402740860 is an apocalyptic number.

It is an amenable number.

402740860 is an abundant number, since it is smaller than the sum of its proper divisors (443014988).

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

402740860 is a wasteful number, since it uses less digits than its factorization.

402740860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20137052 (or 20137050 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 402740860 is about 20068.4045205392. The cubic root of 402740860 is about 738.4853728897.

The spelling of 402740860 in words is "four hundred two million, seven hundred forty thousand, eight hundred sixty".