254089978 has 4 divisors (see below), whose sum is σ = 381134970. Its totient is φ = 127044988.

The previous prime is 254089951. The next prime is 254089987. The reversal of 254089978 is 879980452.

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

It can be written as a sum of positive squares in only one way, i.e., 162639009 + 91450969 = 12753^2 + 9563^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63522493 + ... + 63522496.

Almost surely, 2^254089978 is an apocalyptic number.

254089978 is a deficient number, since it is larger than the sum of its proper divisors (127044992).

254089978 is a wasteful number, since it uses less digits than its factorization.

254089978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127044991.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The square root of 254089978 is about 15940.2000614798. The cubic root of 254089978 is about 633.3773255376.

The spelling of 254089978 in words is "two hundred fifty-four million, eighty-nine thousand, nine hundred seventy-eight".