345621970 has 16 divisors (see below), whose sum is σ = 654863040. Its totient is φ = 130972464.

The previous prime is 345621929. The next prime is 345622033. The reversal of 345621970 is 79126543.

It is a super-2 number, since 2×345621970² = 238909092293361800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 909342 + ... + 909721.

It is an arithmetic number, because the mean of its divisors is an integer number (40928940).

Almost surely, 2^345621970 is an apocalyptic number.

345621970 is a deficient number, since it is larger than the sum of its proper divisors (309241070).

345621970 is a wasteful number, since it uses less digits than its factorization.

345621970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819089.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 345621970 is about 18590.9109513224. The cubic root of 345621970 is about 701.7791273814.

The spelling of 345621970 in words is "three hundred forty-five million, six hundred twenty-one thousand, nine hundred seventy".