249541890 has 32 divisors (see below), whose sum is σ = 644970816. Its totient is φ = 61425600.

The previous prime is 249541883. The next prime is 249541933. The reversal of 249541890 is 98145942.

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, 319536 + ... + 320315.

It is an arithmetic number, because the mean of its divisors is an integer number (20155338).

Almost surely, 2^249541890 is an apocalyptic number.

249541890 is an abundant number, since it is smaller than the sum of its proper divisors (395428926).

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

249541890 is a wasteful number, since it uses less digits than its factorization.

249541890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639874.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 249541890 is about 15796.8949480586. The cubic root of 249541890 is about 629.5755013859.

The spelling of 249541890 in words is "two hundred forty-nine million, five hundred forty-one thousand, eight hundred ninety".