90744215 has 16 divisors (see below), whose sum is σ = 117479808. Its totient is φ = 67032576.

The previous prime is 90744211. The next prime is 90744217. The reversal of 90744215 is 51244709.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 90744215 - 2² = 90744211 is a prime.

It is a super-3 number, since 3×90744215³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90744211) 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, 5567 + ... + 14576.

It is an arithmetic number, because the mean of its divisors is an integer number (7342488).

Almost surely, 2^90744215 is an apocalyptic number.

90744215 is a deficient number, since it is larger than the sum of its proper divisors (26735593).

90744215 is a wasteful number, since it uses less digits than its factorization.

90744215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20218.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 90744215 is about 9525.9758030346. The cubic root of 90744215 is about 449.3723183020.

The spelling of 90744215 in words is "ninety million, seven hundred forty-four thousand, two hundred fifteen".