1051578640 has 40 divisors (see below), whose sum is σ = 2794196160. Its totient is φ = 360541056.

The previous prime is 1051578637. The next prime is 1051578641. The reversal of 1051578640 is 468751501.

1051578640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1051578640² = 2211635272208499200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1051578640.

It is not an unprimeable number, because it can be changed into a prime (1051578641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 938350 + ... + 939469.

It is an arithmetic number, because the mean of its divisors is an integer number (69854904).

Almost surely, 2^1051578640 is an apocalyptic number.

1051578640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1051578640 is an abundant number, since it is smaller than the sum of its proper divisors (1742617520).

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

1051578640 is a wasteful number, since it uses less digits than its factorization.

1051578640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1877839 (or 1877833 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 1051578640 is about 32428.0532872388. The cubic root of 1051578640 is about 1016.9054744338.

The spelling of 1051578640 in words is "one billion, fifty-one million, five hundred seventy-eight thousand, six hundred forty".