978348861 has 96 divisors (see below), whose sum is σ = 1851752448. Its totient is φ = 502951680.

The previous prime is 978348853. The next prime is 978348863. The reversal of 978348861 is 168843879.

It is not a de Polignac number, because 978348861 - 2³ = 978348853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 978348798 and 978348807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978348863) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 664356 + ... + 665826.

It is an arithmetic number, because the mean of its divisors is an integer number (19289088).

Almost surely, 2^978348861 is an apocalyptic number.

It is an amenable number.

978348861 is a deficient number, since it is larger than the sum of its proper divisors (873403587).

978348861 is a wasteful number, since it uses less digits than its factorization.

978348861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533 (or 1521 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 978348861 is about 31278.5687172543. The cubic root of 978348861 is about 992.7302322109.

The spelling of 978348861 in words is "nine hundred seventy-eight million, three hundred forty-eight thousand, eight hundred sixty-one".