1357999020 has 240 divisors, whose sum is σ = 5027033088. Its totient is φ = 300309120.

The previous prime is 1357998991. The next prime is 1357999061. The reversal of 1357999020 is 209997531.

It is a happy number.

1357999020 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1357999020² = 3688322676641920800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 349609 + ... + 353471.

Almost surely, 2^1357999020 is an apocalyptic number.

1357999020 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 1357999020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2513516544).

1357999020 is an abundant number, since it is smaller than the sum of its proper divisors (3669034068).

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

1357999020 is a wasteful number, since it uses less digits than its factorization.

1357999020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3922 (or 3911 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 1357999020 is about 36851.0382486030. The cubic root of 1357999020 is about 1107.3880147731.

The spelling of 1357999020 in words is "one billion, three hundred fifty-seven million, nine hundred ninety-nine thousand, twenty".