401562240 has 64 divisors (see below), whose sum is σ = 1279985760. Its totient is φ = 107082752.

The previous prime is 401562233. The next prime is 401562257. The reversal of 401562240 is 42265104.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×401562240² = 322504465187635200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 401562240.

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, 102654 + ... + 106493.

Almost surely, 2^401562240 is an apocalyptic number.

401562240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401562240 is an abundant number, since it is smaller than the sum of its proper divisors (878423520).

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

401562240 is a wasteful number, since it uses less digits than its factorization.

401562240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209169 (or 209157 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 401562240 is about 20039.0179400089. The cubic root of 401562240 is about 737.7642772108.

The spelling of 401562240 in words is "four hundred one million, five hundred sixty-two thousand, two hundred forty".