990415255 has 16 divisors (see below), whose sum is σ = 1215212544. Its totient is φ = 774562720.

The previous prime is 990415253. The next prime is 990415267. The reversal of 990415255 is 552514099.

It is not a de Polignac number, because 990415255 - 2¹ = 990415253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990415253) 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, 254454 + ... + 258316.

It is an arithmetic number, because the mean of its divisors is an integer number (75950784).

Almost surely, 2^990415255 is an apocalyptic number.

990415255 is a deficient number, since it is larger than the sum of its proper divisors (224797289).

990415255 is a wasteful number, since it uses less digits than its factorization.

990415255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5006.

The product of its (nonzero) digits is 81000, while the sum is 40.

The square root of 990415255 is about 31470.8635884051. The cubic root of 990415255 is about 996.7948228150.

The spelling of 990415255 in words is "nine hundred ninety million, four hundred fifteen thousand, two hundred fifty-five".