53404890 has 128 divisors (see below), whose sum is σ = 162846720. Its totient is φ = 10886400.

The previous prime is 53404843. The next prime is 53404891. The reversal of 53404890 is 9840435.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (53404891) 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, 140721 + ... + 141099.

It is an arithmetic number, because the mean of its divisors is an integer number (1272240).

Almost surely, 2^53404890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53404890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81423360).

53404890 is an abundant number, since it is smaller than the sum of its proper divisors (109441830).

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

53404890 is a wasteful number, since it uses less digits than its factorization.

53404890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 53404890 is about 7307.8649412807. The cubic root of 53404890 is about 376.5826798240.

The spelling of 53404890 in words is "fifty-three million, four hundred four thousand, eight hundred ninety".