1800465408 has 330 divisors, whose sum is σ = 6268462596. Its totient is φ = 513257472.

The previous prime is 1800465397. The next prime is 1800465409. The reversal of 1800465408 is 8045640081.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1800465409) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 4064035 + ... + 4064477.

Almost surely, 2^1800465408 is an apocalyptic number.

1800465408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1800465408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3134231298).

1800465408 is an abundant number, since it is smaller than the sum of its proper divisors (4467997188).

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

1800465408 is an equidigital number, since it uses as much as digits as its factorization.

1800465408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 455 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 1800465408 is about 42431.8914025760. The cubic root of 1800465408 is about 1216.5452310233.

The spelling of 1800465408 in words is "one billion, eight hundred million, four hundred sixty-five thousand, four hundred eight".