978013554 has 16 divisors (see below), whose sum is σ = 2235459648. Its totient is φ = 279432432.

The previous prime is 978013541. The next prime is 978013607. The reversal of 978013554 is 455310879.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 23286037 = 978013554 / (9 + 7 + 8 + 0 + 1 + 3 + 5 + 5 + 4).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11642977 + ... + 11643060.

It is an arithmetic number, because the mean of its divisors is an integer number (139716228).

Almost surely, 2^978013554 is an apocalyptic number.

978013554 is an abundant number, since it is smaller than the sum of its proper divisors (1257446094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

978013554 is a wasteful number, since it uses less digits than its factorization.

978013554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23286049.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 978013554 is about 31273.2082460371. The cubic root of 978013554 is about 992.6168072884.

The spelling of 978013554 in words is "nine hundred seventy-eight million, thirteen thousand, five hundred fifty-four".