115420890 has 32 divisors (see below), whose sum is σ = 298319616. Its totient is φ = 28411200.

The previous prime is 115420883. The next prime is 115420891. The reversal of 115420890 is 98024511.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (115420891) 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, 147586 + ... + 148365.

It is an arithmetic number, because the mean of its divisors is an integer number (9322488).

Almost surely, 2^115420890 is an apocalyptic number.

115420890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115420890 is an abundant number, since it is smaller than the sum of its proper divisors (182898726).

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

115420890 is a wasteful number, since it uses less digits than its factorization.

115420890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295974.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 115420890 is about 10743.4114693611. The cubic root of 115420890 is about 486.8869558998.

The spelling of 115420890 in words is "one hundred fifteen million, four hundred twenty thousand, eight hundred ninety".