2403991872 has 140 divisors (see below), whose sum is σ = 7501554720. Its totient is φ = 759124224.

The previous prime is 2403991871. The next prime is 2403991903. The reversal of 2403991872 is 2781993042.

2403991872 is a `hidden beast` number, since 240 + 399 + 18 + 7 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2403991871) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 86293 + ... + 110699.

Almost surely, 2^2403991872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2403991872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3750777360).

2403991872 is an abundant number, since it is smaller than the sum of its proper divisors (5097562848).

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

2403991872 is a wasteful number, since it uses less digits than its factorization.

2403991872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24450 (or 24431 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 2403991872 is about 49030.5198014461. The cubic root of 2403991872 is about 1339.6077919498.

The spelling of 2403991872 in words is "two billion, four hundred three million, nine hundred ninety-one thousand, eight hundred seventy-two".