245779720 has 16 divisors (see below), whose sum is σ = 553004460. Its totient is φ = 98311872.

The previous prime is 245779691. The next prime is 245779739. The reversal of 245779720 is 27977542.

It can be written as a sum of positive squares in 2 ways, for example, as 221592996 + 24186724 = 14886^2 + 4918^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3072207 + ... + 3072286.

Almost surely, 2^245779720 is an apocalyptic number.

245779720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245779720 is an abundant number, since it is smaller than the sum of its proper divisors (307224740).

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

245779720 is a wasteful number, since it uses less digits than its factorization.

245779720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6144504 (or 6144500 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 245779720 is about 15677.3632987183. The cubic root of 245779720 is about 626.3955758694.

The spelling of 245779720 in words is "two hundred forty-five million, seven hundred seventy-nine thousand, seven hundred twenty".