402152240 has 80 divisors (see below), whose sum is σ = 1115071488. Its totient is φ = 131881728.

The previous prime is 402152227. The next prime is 402152249. The reversal of 402152240 is 42251204.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (402152249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2732 + ... + 28491.

Almost surely, 2^402152240 is an apocalyptic number.

402152240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402152240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557535744).

402152240 is an abundant number, since it is smaller than the sum of its proper divisors (712919248).

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

402152240 is a wasteful number, since it uses less digits than its factorization.

402152240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31266 (or 31260 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 402152240 is about 20053.7338169230. The cubic root of 402152240 is about 738.1254233160.

The spelling of 402152240 in words is "four hundred two million, one hundred fifty-two thousand, two hundred forty".