2520660400 has 60 divisors (see below), whose sum is σ = 6070352544. Its totient is φ = 1005856000.

The previous prime is 2520660391. The next prime is 2520660419. The reversal of 2520660400 is 40660252.

2520660400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165090 + ... + 179710.

Almost surely, 2^2520660400 is an apocalyptic number.

2520660400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2520660400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3035176272).

2520660400 is an abundant number, since it is smaller than the sum of its proper divisors (3549692144).

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

2520660400 is a wasteful number, since it uses less digits than its factorization.

2520660400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15070 (or 15059 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 2520660400 is about 50206.1789026012. The cubic root of 2520660400 is about 1360.9372864174.

The spelling of 2520660400 in words is "two billion, five hundred twenty million, six hundred sixty thousand, four hundred".