1918039452 has 48 divisors (see below), whose sum is σ = 5149132800. Its totient is φ = 544329792.

The previous prime is 1918039423. The next prime is 1918039579. The reversal of 1918039452 is 2549308191.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64108 + ... + 89139.

It is an arithmetic number, because the mean of its divisors is an integer number (107273600).

Almost surely, 2^1918039452 is an apocalyptic number.

1918039452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1918039452 is an abundant number, since it is smaller than the sum of its proper divisors (3231093348).

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

1918039452 is a wasteful number, since it uses less digits than its factorization.

1918039452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153410 (or 153408 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 1918039452 is about 43795.4272955522. The cubic root of 1918039452 is about 1242.4698111897.

The spelling of 1918039452 in words is "one billion, nine hundred eighteen million, thirty-nine thousand, four hundred fifty-two".