978158445 has 32 divisors (see below), whose sum is σ = 1720811520. Its totient is φ = 470514240.

The previous prime is 978158417. The next prime is 978158459. The reversal of 978158445 is 544851879.

It is not a de Polignac number, because 978158445 - 2⁵ = 978158413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2385 + ... + 44294.

It is an arithmetic number, because the mean of its divisors is an integer number (53775360).

Almost surely, 2^978158445 is an apocalyptic number.

It is an amenable number.

978158445 is a deficient number, since it is larger than the sum of its proper divisors (742653075).

978158445 is a wasteful number, since it uses less digits than its factorization.

978158445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46825.

The product of its digits is 1612800, while the sum is 51.

The square root of 978158445 is about 31275.5246958384. The cubic root of 978158445 is about 992.6658230168.

It can be divided in two parts, 978 and 158445, that multiplied together give a triangular number (154959210 = T₁₇₆₀₄).

The spelling of 978158445 in words is "nine hundred seventy-eight million, one hundred fifty-eight thousand, four hundred forty-five".