915144990 has 32 divisors (see below), whose sum is σ = 2243082240. Its totient is φ = 238845984.

The previous prime is 915144977. The next prime is 915145019. The reversal of 915144990 is 99441519.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323110 + ... + 325929.

It is an arithmetic number, because the mean of its divisors is an integer number (70096320).

Almost surely, 2^915144990 is an apocalyptic number.

915144990 is an abundant number, since it is smaller than the sum of its proper divisors (1327937250).

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

915144990 is a wasteful number, since it uses less digits than its factorization.

915144990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649096.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 915144990 is about 30251.3634403476. The cubic root of 915144990 is about 970.8749642341.

The spelling of 915144990 in words is "nine hundred fifteen million, one hundred forty-four thousand, nine hundred ninety".