25216890 has 32 divisors (see below), whose sum is σ = 60791040. Its totient is φ = 6694464.

The previous prime is 25216871. The next prime is 25216903. The reversal of 25216890 is 9861252.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5412 + ... + 8928.

It is an arithmetic number, because the mean of its divisors is an integer number (1899720).

Almost surely, 2^25216890 is an apocalyptic number.

25216890 is an abundant number, since it is smaller than the sum of its proper divisors (35574150).

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

25216890 is a wasteful number, since it uses less digits than its factorization.

25216890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3766.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 25216890 is about 5021.6421616838. The cubic root of 25216890 is about 293.2449271578.

It can be divided in two parts, 25216 and 890, that added together give a triangular number (26106 = T₂₂₈).

The spelling of 25216890 in words is "twenty-five million, two hundred sixteen thousand, eight hundred ninety".