1051398728 has 32 divisors (see below), whose sum is σ = 2154677760. Its totient is φ = 478813440.

The previous prime is 1051398727. The next prime is 1051398739. The reversal of 1051398728 is 8278931501.

It is a super-2 number, since 2×1051398728² = 2210878570480035968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1051398727) 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, 120476 + ... + 128907.

It is an arithmetic number, because the mean of its divisors is an integer number (67333680).

Almost surely, 2^1051398728 is an apocalyptic number.

It is an amenable number.

1051398728 is an abundant number, since it is smaller than the sum of its proper divisors (1103279032).

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

1051398728 is a wasteful number, since it uses less digits than its factorization.

1051398728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249437 (or 249433 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 1051398728 is about 32425.2791506874. The cubic root of 1051398728 is about 1016.8474778417.

The spelling of 1051398728 in words is "one billion, fifty-one million, three hundred ninety-eight thousand, seven hundred twenty-eight".