245971390 has 16 divisors (see below), whose sum is σ = 505998432. Its totient is φ = 84333024.

The previous prime is 245971381. The next prime is 245971421. The reversal of 245971390 is 93179542.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1756869 + ... + 1757008.

It is an arithmetic number, because the mean of its divisors is an integer number (31624902).

Almost surely, 2^245971390 is an apocalyptic number.

245971390 is an abundant number, since it is smaller than the sum of its proper divisors (260027042).

245971390 is a wasteful number, since it uses less digits than its factorization.

245971390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513891.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 245971390 is about 15683.4750613504. The cubic root of 245971390 is about 626.5583639733.

The spelling of 245971390 in words is "two hundred forty-five million, nine hundred seventy-one thousand, three hundred ninety".