70121790 has 24 divisors (see below), whose sum is σ = 182316888. Its totient is φ = 18699120.

The previous prime is 70121789. The next prime is 70121827. The reversal of 70121790 is 9712107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 389476 + ... + 389655.

It is an arithmetic number, because the mean of its divisors is an integer number (7596537).

Almost surely, 2^70121790 is an apocalyptic number.

70121790 is an abundant number, since it is smaller than the sum of its proper divisors (112195098).

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

70121790 is a wasteful number, since it uses less digits than its factorization.

70121790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779144 (or 779141 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 27.

The square root of 70121790 is about 8373.8754468884. The cubic root of 70121790 is about 412.3674064196.

Adding to 70121790 its reverse (9712107), we get a palindrome (79833897).

The spelling of 70121790 in words is "seventy million, one hundred twenty-one thousand, seven hundred ninety".