961478638 has 4 divisors (see below), whose sum is σ = 1442217960. Its totient is φ = 480739318.

The previous prime is 961478627. The next prime is 961478677. The reversal of 961478638 is 836874169.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836874169 = 3677 ⋅227597.

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, 240369658 + ... + 240369661.

It is an arithmetic number, because the mean of its divisors is an integer number (360554490).

Almost surely, 2^961478638 is an apocalyptic number.

961478638 is a deficient number, since it is larger than the sum of its proper divisors (480739322).

961478638 is a wasteful number, since it uses less digits than its factorization.

961478638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480739321.

The product of its digits is 1741824, while the sum is 52.

The square root of 961478638 is about 31007.7190067248. The cubic root of 961478638 is about 986.9910469890.

The spelling of 961478638 in words is "nine hundred sixty-one million, four hundred seventy-eight thousand, six hundred thirty-eight".