1056495640 has 64 divisors (see below), whose sum is σ = 2428911360. Its totient is φ = 413437440.

The previous prime is 1056495631. The next prime is 1056495683. The reversal of 1056495640 is 465946501.

It is a happy number.

It is a super-2 number, since 2×1056495640² = 2232366074678019200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1056495593 and 1056495602.

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, 1286430 + ... + 1287250.

It is an arithmetic number, because the mean of its divisors is an integer number (37951740).

Almost surely, 2^1056495640 is an apocalyptic number.

1056495640 is a gapful number since it is divisible by the number (10) 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 1056495640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1214455680).

1056495640 is an abundant number, since it is smaller than the sum of its proper divisors (1372415720).

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

1056495640 is a wasteful number, since it uses less digits than its factorization.

1056495640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492 (or 1488 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 1056495640 is about 32503.7788572344. The cubic root of 1056495640 is about 1018.4879685908.

The spelling of 1056495640 in words is "one billion, fifty-six million, four hundred ninety-five thousand, six hundred forty".