65490984 has 128 divisors (see below), whose sum is σ = 198979200. Its totient is φ = 19837440.

The previous prime is 65490983. The next prime is 65490989. The reversal of 65490984 is 48909456.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (65490983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232924 + ... + 233204.

It is an arithmetic number, because the mean of its divisors is an integer number (1554525).

Almost surely, 2^65490984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65490984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99489600).

65490984 is an abundant number, since it is smaller than the sum of its proper divisors (133488216).

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

65490984 is a wasteful number, since it uses less digits than its factorization.

65490984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 65490984 is about 8092.6499986098. The cubic root of 65490984 is about 403.0824026380.

The spelling of 65490984 in words is "sixty-five million, four hundred ninety thousand, nine hundred eighty-four".