65390390 has 16 divisors (see below), whose sum is σ = 126757008. Its totient is φ = 24144096.

The previous prime is 65390371. The next prime is 65390411. The reversal of 65390390 is 9309356.

It is a self number, because there is not a number n which added to its sum of digits gives 65390390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251372 + ... + 251631.

It is an arithmetic number, because the mean of its divisors is an integer number (7922313).

Almost surely, 2^65390390 is an apocalyptic number.

65390390 is a deficient number, since it is larger than the sum of its proper divisors (61366618).

65390390 is a wasteful number, since it uses less digits than its factorization.

65390390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503023.

The product of its (nonzero) digits is 21870, while the sum is 35.

The square root of 65390390 is about 8086.4324643195. The cubic root of 65390390 is about 402.8759190029.

The spelling of 65390390 in words is "sixty-five million, three hundred ninety thousand, three hundred ninety".