70890750 has 144 divisors (see below), whose sum is σ = 223331472. Its totient is φ = 16178400.

The previous prime is 70890749. The next prime is 70890793. The reversal of 70890750 is 5709807.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 109929 + ... + 110571.

It is an arithmetic number, because the mean of its divisors is an integer number (1550913).

Almost surely, 2^70890750 is an apocalyptic number.

70890750 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 70890750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111665736).

70890750 is an abundant number, since it is smaller than the sum of its proper divisors (152440722).

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

70890750 is a wasteful number, since it uses less digits than its factorization.

70890750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 70890750 is about 8419.6644826264. The cubic root of 70890750 is about 413.8692788998.

The spelling of 70890750 in words is "seventy million, eight hundred ninety thousand, seven hundred fifty".