357143940 has 36 divisors (see below), whose sum is σ = 1083337164. Its totient is φ = 95238336.

The previous prime is 357143923. The next prime is 357143947. The reversal of 357143940 is 49341753.

357143940 is a `hidden beast` number, since 3 + 571 + 43 + 9 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 164711556 + 192432384 = 12834^2 + 13872^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 357143895 and 357143904.

It is not an unprimeable number, because it can be changed into a prime (357143947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 991887 + ... + 992246.

It is an arithmetic number, because the mean of its divisors is an integer number (30092699).

Almost surely, 2^357143940 is an apocalyptic number.

357143940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

357143940 is an abundant number, since it is smaller than the sum of its proper divisors (726193224).

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

357143940 is a wasteful number, since it uses less digits than its factorization.

357143940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984148 (or 1984143 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 357143940 is about 18898.2523001467. The cubic root of 357143940 is about 709.4924230441.

The spelling of 357143940 in words is "three hundred fifty-seven million, one hundred forty-three thousand, nine hundred forty".