245405278 has 4 divisors (see below), whose sum is σ = 368107920. Its totient is φ = 122702638.

The previous prime is 245405191. The next prime is 245405327. The reversal of 245405278 is 872504542.

It is a happy number.

245405278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61351318 + ... + 61351321.

It is an arithmetic number, because the mean of its divisors is an integer number (92026980).

Almost surely, 2^245405278 is an apocalyptic number.

245405278 is a deficient number, since it is larger than the sum of its proper divisors (122702642).

245405278 is a wasteful number, since it uses less digits than its factorization.

245405278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122702641.

The product of its (nonzero) digits is 89600, while the sum is 37.

The square root of 245405278 is about 15665.4166238884. The cubic root of 245405278 is about 626.0773125294.

The spelling of 245405278 in words is "two hundred forty-five million, four hundred five thousand, two hundred seventy-eight".