90070620 has 24 divisors (see below), whose sum is σ = 252197904. Its totient is φ = 24018816.

The previous prime is 90070619. The next prime is 90070633. The reversal of 90070620 is 2607009.

90070620 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×90070620² = 16225433174368800, which contains 22 as substring.

90070620 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750529 + ... + 750648.

It is an arithmetic number, because the mean of its divisors is an integer number (10508246).

Almost surely, 2^90070620 is an apocalyptic number.

It is an amenable number.

90070620 is an abundant number, since it is smaller than the sum of its proper divisors (162127284).

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

90070620 is a wasteful number, since it uses less digits than its factorization.

90070620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501189 (or 1501187 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 90070620 is about 9490.5542514650. The cubic root of 90070620 is about 448.2576576420.

Adding to 90070620 its reverse (2607009), we get a palindrome (92677629).

The spelling of 90070620 in words is "ninety million, seventy thousand, six hundred twenty".