345457878 has 8 divisors (see below), whose sum is σ = 690915768. Its totient is φ = 115152624.

The previous prime is 345457877. The next prime is 345457883. The reversal of 345457878 is 878754543.

It is a sphenic number, since it is the product of 3 distinct primes.

345457878 is an admirable number.

It is a super-2 number, since 2×345457878² = 238682290944525768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 345457878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345457877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28788151 + ... + 28788162.

It is an arithmetic number, because the mean of its divisors is an integer number (86364471).

Almost surely, 2^345457878 is an apocalyptic number.

345457878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

345457878 is a wasteful number, since it uses less digits than its factorization.

345457878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57576318.

The product of its digits is 3763200, while the sum is 51.

The square root of 345457878 is about 18586.4971955449. The cubic root of 345457878 is about 701.6680478593.

The spelling of 345457878 in words is "three hundred forty-five million, four hundred fifty-seven thousand, eight hundred seventy-eight".