245404340 has 12 divisors (see below), whose sum is σ = 515349156. Its totient is φ = 98161728.

The previous prime is 245404337. The next prime is 245404349. The reversal of 245404340 is 43404542.

It can be written as a sum of positive squares in 2 ways, for example, as 136702864 + 108701476 = 11692^2 + 10426^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245404349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6135089 + ... + 6135128.

It is an arithmetic number, because the mean of its divisors is an integer number (42945763).

Almost surely, 2^245404340 is an apocalyptic number.

245404340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245404340 is an abundant number, since it is smaller than the sum of its proper divisors (269944816).

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

245404340 is a wasteful number, since it uses less digits than its factorization.

245404340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12270226 (or 12270224 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 245404340 is about 15665.3866853008. The cubic root of 245404340 is about 626.0765148540.

Adding to 245404340 its reverse (43404542), we get a palindrome (288808882).

The spelling of 245404340 in words is "two hundred forty-five million, four hundred four thousand, three hundred forty".