2720390400 has 864 divisors, whose sum is σ = 12348376320. Its totient is φ = 570654720.

The previous prime is 2720390383. The next prime is 2720390423. The reversal of 2720390400 is 40930272.

2720390400 is a `hidden beast` number, since 272 + 0 + 390 + 4 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15724714 + ... + 15724886.

Almost surely, 2^2720390400 is an apocalyptic number.

2720390400 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 2720390400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6174188160).

2720390400 is an abundant number, since it is smaller than the sum of its proper divisors (9627985920).

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

2720390400 is a wasteful number, since it uses less digits than its factorization.

2720390400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 2720390400 is about 52157.3618964763. The cubic root of 2720390400 is about 1395.9731907288.

The spelling of 2720390400 in words is "two billion, seven hundred twenty million, three hundred ninety thousand, four hundred".