347990842 has 16 divisors (see below), whose sum is σ = 525044520. Its totient is φ = 172979712.

The previous prime is 347990803. The next prime is 347990843. The reversal of 347990842 is 248099743.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 280931121 + 67059721 = 16761^2 + 8189^2 .

It is a super-2 number, since 2×347990842² = 242195252231737928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 347990792 and 347990801.

It is not an unprimeable number, because it can be changed into a prime (347990843) 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, 336358 + ... + 337390.

Almost surely, 2^347990842 is an apocalyptic number.

347990842 is a deficient number, since it is larger than the sum of its proper divisors (177053678).

347990842 is a wasteful number, since it uses less digits than its factorization.

347990842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 347990842 is about 18654.5126443979. The cubic root of 347990842 is about 703.3787954312.

The spelling of 347990842 in words is "three hundred forty-seven million, nine hundred ninety thousand, eight hundred forty-two".