1056207138 has 64 divisors (see below), whose sum is σ = 2508423168. Its totient is φ = 290122560.

The previous prime is 1056207137. The next prime is 1056207181. The reversal of 1056207138 is 8317026501.

It is a super-2 number, since 2×1056207138² = 2231147036724302088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1056207099 and 1056207108.

It is not an unprimeable number, because it can be changed into a prime (1056207137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201831 + ... + 206997.

It is an arithmetic number, because the mean of its divisors is an integer number (39194112).

Almost surely, 2^1056207138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1056207138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1254211584).

1056207138 is an abundant number, since it is smaller than the sum of its proper divisors (1452216030).

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

1056207138 is a wasteful number, since it uses less digits than its factorization.

1056207138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5367.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1056207138 is about 32499.3405779256. The cubic root of 1056207138 is about 1018.3952524592.

The spelling of 1056207138 in words is "one billion, fifty-six million, two hundred seven thousand, one hundred thirty-eight".