90977418 has 120 divisors (see below), whose sum is σ = 241919172. Its totient is φ = 25474176.

The previous prime is 90977407. The next prime is 90977429. The reversal of 90977418 is 81477909.

It is an interprime number because it is at equal distance from previous prime (90977407) and next prime (90977429).

It can be written as a sum of positive squares in 2 ways, for example, as 90497169 + 480249 = 9513^2 + 693^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 579396 + ... + 579552.

Almost surely, 2^90977418 is an apocalyptic number.

90977418 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 90977418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120959586).

90977418 is an abundant number, since it is smaller than the sum of its proper divisors (150941754).

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

90977418 is a wasteful number, since it uses less digits than its factorization.

90977418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 90977418 is about 9538.2083223213. The cubic root of 90977418 is about 449.7569354005.

The spelling of 90977418 in words is "ninety million, nine hundred seventy-seven thousand, four hundred eighteen".