90142620 has 48 divisors (see below), whose sum is σ = 258276480. Its totient is φ = 23478336.

The previous prime is 90142607. The next prime is 90142627. The reversal of 90142620 is 2624109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90142627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14890 + ... + 20049.

It is an arithmetic number, because the mean of its divisors is an integer number (5380760).

Almost surely, 2^90142620 is an apocalyptic number.

It is an amenable number.

90142620 is an abundant number, since it is smaller than the sum of its proper divisors (168133860).

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

90142620 is a wasteful number, since it uses less digits than its factorization.

90142620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34994 (or 34992 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 90142620 is about 9494.3467389810. The cubic root of 90142620 is about 448.3770674835.

Adding to 90142620 its reverse (2624109), we get a palindrome (92766729).

The spelling of 90142620 in words is "ninety million, one hundred forty-two thousand, six hundred twenty".