402549240 has 64 divisors (see below), whose sum is σ = 1222963200. Its totient is φ = 105985152.

The previous prime is 402549221. The next prime is 402549263. The reversal of 402549240 is 42945204.

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 = 402549198 and 402549207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11752 + ... + 30711.

It is an arithmetic number, because the mean of its divisors is an integer number (19108800).

Almost surely, 2^402549240 is an apocalyptic number.

402549240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402549240 is an abundant number, since it is smaller than the sum of its proper divisors (820413960).

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

402549240 is a wasteful number, since it uses less digits than its factorization.

402549240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42556 (or 42552 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 402549240 is about 20063.6297812734. The cubic root of 402549240 is about 738.3682330363.

It can be divided in two parts, 40254 and 9240, that added together give a palindrome (49494).

The spelling of 402549240 in words is "four hundred two million, five hundred forty-nine thousand, two hundred forty".