215470090 has 64 divisors (see below), whose sum is σ = 438939648. Its totient is φ = 75476800.

The previous prime is 215470061. The next prime is 215470091. The reversal of 215470090 is 90074512.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (215470091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 366777 + ... + 367363.

It is an arithmetic number, because the mean of its divisors is an integer number (6858432).

Almost surely, 2^215470090 is an apocalyptic number.

215470090 is an abundant number, since it is smaller than the sum of its proper divisors (223469558).

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

215470090 is a wasteful number, since it uses less digits than its factorization.

215470090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 215470090 is about 14678.8994819094. The cubic root of 215470090 is about 599.5089408037.

The spelling of 215470090 in words is "two hundred fifteen million, four hundred seventy thousand, ninety".