70090890 has 32 divisors (see below), whose sum is σ = 175533696. Its totient is φ = 17878080.

The previous prime is 70090861. The next prime is 70090921. The reversal of 70090890 is 9809007.

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, 50101 + ... + 51480.

It is an arithmetic number, because the mean of its divisors is an integer number (5485428).

Almost surely, 2^70090890 is an apocalyptic number.

70090890 is an abundant number, since it is smaller than the sum of its proper divisors (105442806).

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

70090890 is a wasteful number, since it uses less digits than its factorization.

70090890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101614.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 70090890 is about 8372.0302197257. The cubic root of 70090890 is about 412.3068259877.

Adding to 70090890 its reverse (9809007), we get a palindrome (79899897).

The spelling of 70090890 in words is "seventy million, ninety thousand, eight hundred ninety".