245742690 has 16 divisors (see below), whose sum is σ = 589782528. Its totient is φ = 65531376.

The previous prime is 245742689. The next prime is 245742697. The reversal of 245742690 is 96247542.

It is a super-2 number, since 2×245742690² = 120778939376872200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (245742697) 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, 4095682 + ... + 4095741.

It is an arithmetic number, because the mean of its divisors is an integer number (36861408).

Almost surely, 2^245742690 is an apocalyptic number.

245742690 is an abundant number, since it is smaller than the sum of its proper divisors (344039838).

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

245742690 is a wasteful number, since it uses less digits than its factorization.

245742690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8191433.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 245742690 is about 15676.1822520663. The cubic root of 245742690 is about 626.3641160007.

The spelling of 245742690 in words is "two hundred forty-five million, seven hundred forty-two thousand, six hundred ninety".