402557274 has 48 divisors (see below), whose sum is σ = 1005987840. Its totient is φ = 113957280.

The previous prime is 402557261. The next prime is 402557327. The reversal of 402557274 is 472755204.

It is a happy number.

It is a super-2 number, since 2×402557274² = 324104717700622152, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 922 + ... + 28389.

It is an arithmetic number, because the mean of its divisors is an integer number (20958080).

Almost surely, 2^402557274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402557274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (502993920).

402557274 is an abundant number, since it is smaller than the sum of its proper divisors (603430566).

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

402557274 is a wasteful number, since it uses less digits than its factorization.

402557274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29435 (or 29432 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 36.

The square root of 402557274 is about 20063.8299932989. The cubic root of 402557274 is about 738.3731450738.

The spelling of 402557274 in words is "four hundred two million, five hundred fifty-seven thousand, two hundred seventy-four".