245278440 has 192 divisors, whose sum is σ = 907770240. Its totient is φ = 56855040.

The previous prime is 245278387. The next prime is 245278457. The reversal of 245278440 is 44872542.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 245278395 and 245278404.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 89734 + ... + 92426.

It is an arithmetic number, because the mean of its divisors is an integer number (4727970).

Almost surely, 2^245278440 is an apocalyptic number.

245278440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245278440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (453885120).

245278440 is an abundant number, since it is smaller than the sum of its proper divisors (662491800).

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

245278440 is a wasteful number, since it uses less digits than its factorization.

245278440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744 (or 2737 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 36.

The square root of 245278440 is about 15661.3677563615. The cubic root of 245278440 is about 625.9694310148.

The spelling of 245278440 in words is "two hundred forty-five million, two hundred seventy-eight thousand, four hundred forty".