1051391790 has 48 divisors (see below), whose sum is σ = 2877498000. Its totient is φ = 265614336.

The previous prime is 1051391777. The next prime is 1051391797. The reversal of 1051391790 is 971931501.

It is a super-2 number, since 2×1051391790² = 2210849392158808200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051391797) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 305715 + ... + 309134.

It is an arithmetic number, because the mean of its divisors is an integer number (59947875).

Almost surely, 2^1051391790 is an apocalyptic number.

1051391790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1051391790 is an abundant number, since it is smaller than the sum of its proper divisors (1826106210).

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

1051391790 is a wasteful number, since it uses less digits than its factorization.

1051391790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614881 (or 614878 counting only the distinct ones).

The product of its (nonzero) digits is 8505, while the sum is 36.

The square root of 1051391790 is about 32425.1721660811. The cubic root of 1051391790 is about 1016.8452411693.

It can be divided in two parts, 105139 and 1790, that added together give a square (106929 = 327²).

The spelling of 1051391790 in words is "one billion, fifty-one million, three hundred ninety-one thousand, seven hundred ninety".