978044545 has 16 divisors (see below), whose sum is σ = 1203409872. Its totient is φ = 762634240.

The previous prime is 978044539. The next prime is 978044549. The reversal of 978044545 is 545440879.

It can be written as a sum of positive squares in 8 ways, for example, as 14500864 + 963543681 = 3808^2 + 31041^2 .

It is not a de Polignac number, because 978044545 - 2¹⁷ = 977913473 is a prime.

It is a super-2 number, since 2×978044545² = 1913142264008514050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 978044495 and 978044504.

It is not an unprimeable number, because it can be changed into a prime (978044549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353889 + ... + 356641.

It is an arithmetic number, because the mean of its divisors is an integer number (75213117).

Almost surely, 2^978044545 is an apocalyptic number.

It is an amenable number.

978044545 is a deficient number, since it is larger than the sum of its proper divisors (225365327).

978044545 is a wasteful number, since it uses less digits than its factorization.

978044545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4532.

The product of its (nonzero) digits is 806400, while the sum is 46.

The square root of 978044545 is about 31273.7037301308. The cubic root of 978044545 is about 992.6272917589.

The spelling of 978044545 in words is "nine hundred seventy-eight million, forty-four thousand, five hundred forty-five".