1051872720 has 80 divisors (see below), whose sum is σ = 3265535040. Its totient is φ = 280092672.

The previous prime is 1051872691. The next prime is 1051872733. The reversal of 1051872720 is 272781501.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1051872720² = 2212872438160396800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186096 + ... + 191664.

It is an arithmetic number, because the mean of its divisors is an integer number (40819188).

Almost surely, 2^1051872720 is an apocalyptic number.

1051872720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1051872720 is an abundant number, since it is smaller than the sum of its proper divisors (2213662320).

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

1051872720 is a wasteful number, since it uses less digits than its factorization.

1051872720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6372 (or 6366 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 1051872720 is about 32432.5873158464. The cubic root of 1051872720 is about 1017.0002600820. Note that the first 3 decimals are identical.

It can be divided in two parts, 10518 and 72720, that added together give a palindrome (83238).

The spelling of 1051872720 in words is "one billion, fifty-one million, eight hundred seventy-two thousand, seven hundred twenty".