403561144 has 16 divisors (see below), whose sum is σ = 864774000. Its totient is φ = 172954752.

The previous prime is 403561141. The next prime is 403561153. The reversal of 403561144 is 441165304.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403561141) 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, 3603169 + ... + 3603280.

It is an arithmetic number, because the mean of its divisors is an integer number (54048375).

Almost surely, 2^403561144 is an apocalyptic number.

It is an amenable number.

403561144 is an abundant number, since it is smaller than the sum of its proper divisors (461212856).

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

403561144 is a wasteful number, since it uses less digits than its factorization.

403561144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7206462 (or 7206458 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 403561144 is about 20088.8313248929. The cubic root of 403561144 is about 738.9864038618.

The spelling of 403561144 in words is "four hundred three million, five hundred sixty-one thousand, one hundred forty-four".