2978930 has 8 divisors (see below), whose sum is σ = 5362092. Its totient is φ = 1191568.

The previous prime is 2978923. The next prime is 2978933. The reversal of 2978930 is 398792.

It can be written as a sum of positive squares in 2 ways, for example, as 2968729 + 10201 = 1723^2 + 101^2 .

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

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (2978933) 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, 148937 + ... + 148956.

2^2978930 is an apocalyptic number.

2978930 is a deficient number, since it is larger than the sum of its proper divisors (2383162).

2978930 is a wasteful number, since it uses less digits than its factorization.

2978930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297900.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 2978930 is about 1725.9577051597. The cubic root of 2978930 is about 143.8865168142.

The spelling of 2978930 in words is "two million, nine hundred seventy-eight thousand, nine hundred thirty".