90155454 has 16 divisors (see below), whose sum is σ = 190917648. Its totient is φ = 28284032.

The previous prime is 90155393. The next prime is 90155459. The reversal of 90155454 is 45455109.

It is a super-2 number, since 2×90155454² = 16256011771892232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90155459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441837 + ... + 442040.

It is an arithmetic number, because the mean of its divisors is an integer number (11932353).

Almost surely, 2^90155454 is an apocalyptic number.

90155454 is an abundant number, since it is smaller than the sum of its proper divisors (100762194).

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

90155454 is a wasteful number, since it uses less digits than its factorization.

90155454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883899.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 90155454 is about 9495.0225908104. The cubic root of 90155454 is about 448.3983456100.

It can be divided in two parts, 90155 and 454, that added together give a palindrome (90609).

The spelling of 90155454 in words is "ninety million, one hundred fifty-five thousand, four hundred fifty-four".