65381490 has 96 divisors (see below), whose sum is σ = 181823616. Its totient is φ = 16243200.

The previous prime is 65381471. The next prime is 65381497. The reversal of 65381490 is 9418356.

It is not an unprimeable number, because it can be changed into a prime (65381497) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 230889 + ... + 231171.

It is an arithmetic number, because the mean of its divisors is an integer number (1893996).

Almost surely, 2^65381490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65381490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90911808).

65381490 is an abundant number, since it is smaller than the sum of its proper divisors (116442126).

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

65381490 is a wasteful number, since it uses less digits than its factorization.

65381490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 65381490 is about 8085.8821411148. The cubic root of 65381490 is about 402.8576402805.

The spelling of 65381490 in words is "sixty-five million, three hundred eighty-one thousand, four hundred ninety".