65428890 has 16 divisors (see below), whose sum is σ = 157029408. Its totient is φ = 17447696.

The previous prime is 65428889. The next prime is 65428927. The reversal of 65428890 is 9882456.

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, 1090452 + ... + 1090511.

It is an arithmetic number, because the mean of its divisors is an integer number (9814338).

Almost surely, 2^65428890 is an apocalyptic number.

65428890 is an abundant number, since it is smaller than the sum of its proper divisors (91600518).

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

65428890 is a wasteful number, since it uses less digits than its factorization.

65428890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180973.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 65428890 is about 8088.8126446346. The cubic root of 65428890 is about 402.9549707809.

The spelling of 65428890 in words is "sixty-five million, four hundred twenty-eight thousand, eight hundred ninety".