245443990 has 16 divisors (see below), whose sum is σ = 481962960. Its totient is φ = 89252320.

The previous prime is 245443987. The next prime is 245443993. The reversal of 245443990 is 99344542.

245443990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (245443987) and next prime (245443993).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245443993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1115545 + ... + 1115764.

It is an arithmetic number, because the mean of its divisors is an integer number (30122685).

Almost surely, 2^245443990 is an apocalyptic number.

245443990 is a deficient number, since it is larger than the sum of its proper divisors (236518970).

245443990 is a wasteful number, since it uses less digits than its factorization.

245443990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231327.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 245443990 is about 15666.6521631139. The cubic root of 245443990 is about 626.1102314500.

The spelling of 245443990 in words is "two hundred forty-five million, four hundred forty-three thousand, nine hundred ninety".