90415470 has 32 divisors (see below), whose sum is σ = 218308608. Its totient is φ = 23965088.

The previous prime is 90415463. The next prime is 90415477. The reversal of 90415470 is 7451409.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (90415463) and next prime (90415477).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90415477) 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, 4014 + ... + 14033.

It is an arithmetic number, because the mean of its divisors is an integer number (6822144).

Almost surely, 2^90415470 is an apocalyptic number.

90415470 is an abundant number, since it is smaller than the sum of its proper divisors (127893138).

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

90415470 is a wasteful number, since it uses less digits than its factorization.

90415470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18224.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 90415470 is about 9508.7049591414. The cubic root of 90415470 is about 448.8290048489.

Adding to 90415470 its reverse (7451409), we get a palindrome (97866879).

The spelling of 90415470 in words is "ninety million, four hundred fifteen thousand, four hundred seventy".