1357428280 has 96 divisors (see below), whose sum is σ = 3330892800. Its totient is φ = 497622528.

The previous prime is 1357428277. The next prime is 1357428299. The reversal of 1357428280 is 828247531.

It is a happy number.

It is a super-2 number, since 2×1357428280² = 3685223070687516800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1060681 + ... + 1061959.

It is an arithmetic number, because the mean of its divisors is an integer number (34696800).

Almost surely, 2^1357428280 is an apocalyptic number.

1357428280 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 1357428280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1665446400).

1357428280 is an abundant number, since it is smaller than the sum of its proper divisors (1973464520).

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

1357428280 is a wasteful number, since it uses less digits than its factorization.

1357428280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473 (or 1456 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 1357428280 is about 36843.2935552727. The cubic root of 1357428280 is about 1107.2328553092.

The spelling of 1357428280 in words is "one billion, three hundred fifty-seven million, four hundred twenty-eight thousand, two hundred eighty".