978320145 has 64 divisors (see below), whose sum is σ = 1765048320. Its totient is φ = 458553600.

The previous prime is 978320141. The next prime is 978320149. The reversal of 978320145 is 541023879.

It is an interprime number because it is at equal distance from previous prime (978320141) and next prime (978320149).

It is not a de Polignac number, because 978320145 - 2² = 978320141 is a prime.

It is a super-2 number, since 2×978320145² = 1914220612225642050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (978320141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1165636 + ... + 1166474.

It is an arithmetic number, because the mean of its divisors is an integer number (27578880).

Almost surely, 2^978320145 is an apocalyptic number.

It is an amenable number.

978320145 is a deficient number, since it is larger than the sum of its proper divisors (786728175).

978320145 is a wasteful number, since it uses less digits than its factorization.

978320145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 978320145 is about 31278.1096775365. The cubic root of 978320145 is about 992.7205194109.

It can be divided in two parts, 978 and 320145, that added together give a palindrome (321123).

The spelling of 978320145 in words is "nine hundred seventy-eight million, three hundred twenty thousand, one hundred forty-five".