245397940 has 24 divisors (see below), whose sum is σ = 517262760. Its totient is φ = 97792128.

The previous prime is 245397877. The next prime is 245397959. The reversal of 245397940 is 49793542.

245397940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 15147664 + 230250276 = 3892^2 + 15174^2 .

It is a super-3 number, since 3×245397940³ (a number of 26 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17427 + ... + 28186.

It is an arithmetic number, because the mean of its divisors is an integer number (21552615).

Almost surely, 2^245397940 is an apocalyptic number.

245397940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245397940 is an abundant number, since it is smaller than the sum of its proper divisors (271864820).

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

245397940 is a wasteful number, since it uses less digits than its factorization.

245397940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45891 (or 45889 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 245397940 is about 15665.1824119606. The cubic root of 245397940 is about 626.0710722383.

The spelling of 245397940 in words is "two hundred forty-five million, three hundred ninety-seven thousand, nine hundred forty".