402297240 has 32 divisors (see below), whose sum is σ = 1206892080. Its totient is φ = 107279232.

The previous prime is 402297239. The next prime is 402297253. The reversal of 402297240 is 42792204.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 402297198 and 402297207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1676119 + ... + 1676358.

Almost surely, 2^402297240 is an apocalyptic number.

402297240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402297240 is an abundant number, since it is smaller than the sum of its proper divisors (804594840).

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

402297240 is a wasteful number, since it uses less digits than its factorization.

402297240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352491 (or 3352487 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 402297240 is about 20057.3487779417. The cubic root of 402297240 is about 738.2141254831.

The spelling of 402297240 in words is "four hundred two million, two hundred ninety-seven thousand, two hundred forty".