70890442 has 32 divisors (see below), whose sum is σ = 133125120. Its totient is φ = 27605760.

The previous prime is 70890427. The next prime is 70890451. The reversal of 70890442 is 24409807.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 70890398 and 70890407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1767 + ... + 12037.

It is an arithmetic number, because the mean of its divisors is an integer number (4160160).

Almost surely, 2^70890442 is an apocalyptic number.

70890442 is a deficient number, since it is larger than the sum of its proper divisors (62234678).

70890442 is a wasteful number, since it uses less digits than its factorization.

70890442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10326.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 70890442 is about 8419.6461920914. The cubic root of 70890442 is about 413.8686795178.

The spelling of 70890442 in words is "seventy million, eight hundred ninety thousand, four hundred forty-two".