245890 has 16 divisors (see below), whose sum is σ = 450432. Its totient is φ = 96624.

The previous prime is 245881. The next prime is 245897. The reversal of 245890 is 98542.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (245897) by changing a digit.

245890 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487 + ... + 853.

It is an arithmetic number, because the mean of its divisors is an integer number (28152).

2²⁴⁵⁸⁹⁰ is an apocalyptic number.

245890 is a deficient number, since it is larger than the sum of its proper divisors (204542).

245890 is a wasteful number, since it uses less digits than its factorization.

245890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 245890 is about 495.8729676036. The cubic root of 245890 is about 62.6489248603.

The spelling of 245890 in words is "two hundred forty-five thousand, eight hundred ninety".