918861490 has 8 divisors (see below), whose sum is σ = 1653950700. Its totient is φ = 367544592.

The previous prime is 918861487. The next prime is 918861499. The reversal of 918861490 is 94168819.

It can be written as a sum of positive squares in 2 ways, for example, as 833650129 + 85211361 = 28873^2 + 9231^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 918861490.

It is not an unprimeable number, because it can be changed into a prime (918861499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45943065 + ... + 45943084.

Almost surely, 2^918861490 is an apocalyptic number.

918861490 is a deficient number, since it is larger than the sum of its proper divisors (735089210).

918861490 is a wasteful number, since it uses less digits than its factorization.

918861490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91886156.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 918861490 is about 30312.7281847082. The cubic root of 918861490 is about 972.1874641953.

The spelling of 918861490 in words is "nine hundred eighteen million, eight hundred sixty-one thousand, four hundred ninety".