3457940042 has 4 divisors (see below), whose sum is σ = 5186910066. Its totient is φ = 1728970020.

The previous prime is 3457940033. The next prime is 3457940053. The reversal of 3457940042 is 2400497543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2400497543 = 4289 ⋅559687.

It can be written as a sum of positive squares in only one way, i.e., 3212735761 + 245204281 = 56681^2 + 15659^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3457939978 and 3457940005.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864485009 + ... + 864485012.

Almost surely, 2^3457940042 is an apocalyptic number.

3457940042 is a deficient number, since it is larger than the sum of its proper divisors (1728970024).

3457940042 is a wasteful number, since it uses less digits than its factorization.

3457940042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728970023.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 3457940042 is about 58804.2519040928. The cubic root of 3457940042 is about 1512.1881120177.

The spelling of 3457940042 in words is "three billion, four hundred fifty-seven million, nine hundred forty thousand, forty-two".