402005544 has 16 divisors (see below), whose sum is σ = 1005013920. Its totient is φ = 134001840.

The previous prime is 402005543. The next prime is 402005557. The reversal of 402005544 is 445500204.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 16750231 = 402005544 / (4 + 0 + 2 + 0 + 0 + 5 + 5 + 4 + 4).

It is not an unprimeable number, because it can be changed into a prime (402005543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8375092 + ... + 8375139.

It is an arithmetic number, because the mean of its divisors is an integer number (62813370).

Almost surely, 2^402005544 is an apocalyptic number.

It is an amenable number.

402005544 is an abundant number, since it is smaller than the sum of its proper divisors (603008376).

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

402005544 is a wasteful number, since it uses less digits than its factorization.

402005544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16750240 (or 16750236 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 402005544 is about 20050.0759100807. The cubic root of 402005544 is about 738.0356619396.

Adding to 402005544 its reverse (445500204), we get a palindrome (847505748).

The spelling of 402005544 in words is "four hundred two million, five thousand, five hundred forty-four".