418911990 has 128 divisors (see below), whose sum is σ = 1195499520. Its totient is φ = 91929600.

The previous prime is 418911979. The next prime is 418911991. The reversal of 418911990 is 99119814.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (418911991) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1490650 + ... + 1490930.

It is an arithmetic number, because the mean of its divisors is an integer number (9339840).

Almost surely, 2^418911990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 418911990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (597749760).

418911990 is an abundant number, since it is smaller than the sum of its proper divisors (776587530).

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

418911990 is a wasteful number, since it uses less digits than its factorization.

418911990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558.

The product of its (nonzero) digits is 23328, while the sum is 42.

The square root of 418911990 is about 20467.3395926290. The cubic root of 418911990 is about 748.2400153917.

The spelling of 418911990 in words is "four hundred eighteen million, nine hundred eleven thousand, nine hundred ninety".