3896908978 has 4 divisors (see below), whose sum is σ = 5845363470. Its totient is φ = 1948454488.

The previous prime is 3896908937. The next prime is 3896908991. The reversal of 3896908978 is 8798096983.

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., 3619586569 + 277322409 = 60163^2 + 16653^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974227243 + ... + 974227246.

Almost surely, 2^3896908978 is an apocalyptic number.

3896908978 is a deficient number, since it is larger than the sum of its proper divisors (1948454492).

3896908978 is a wasteful number, since it uses less digits than its factorization.

3896908978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948454491.

The product of its (nonzero) digits is 47029248, while the sum is 67.

The square root of 3896908978 is about 62425.2270961027. The cubic root of 3896908978 is about 1573.6449557004.

The spelling of 3896908978 in words is "three billion, eight hundred ninety-six million, nine hundred eight thousand, nine hundred seventy-eight".