2920978 has 8 divisors (see below), whose sum is σ = 4406220. Its totient is φ = 1452240.

The previous prime is 2920969. The next prime is 2920979. The reversal of 2920978 is 8790292.

It can be written as a sum of positive squares in 2 ways, for example, as 1682209 + 1238769 = 1297^2 + 1113^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2920978² = 17064224952968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2920979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3673 + ... + 4396.

2^2920978 is an apocalyptic number.

2920978 is a deficient number, since it is larger than the sum of its proper divisors (1485242).

2920978 is a wasteful number, since it uses less digits than its factorization.

2920978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8252.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 2920978 is about 1709.0868907109. The cubic root of 2920978 is about 142.9473456037.

The spelling of 2920978 in words is "two million, nine hundred twenty thousand, nine hundred seventy-eight".