2991378 has 16 divisors (see below), whose sum is σ = 6443136. Its totient is φ = 920400.

The previous prime is 2991377. The next prime is 2991397. The reversal of 2991378 is 8731992.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (2991377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19098 + ... + 19253.

It is an arithmetic number, because the mean of its divisors is an integer number (402696).

2^2991378 is an apocalyptic number.

2991378 is an abundant number, since it is smaller than the sum of its proper divisors (3451758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2991378 is a wasteful number, since it uses less digits than its factorization.

2991378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38369.

The product of its digits is 27216, while the sum is 39.

The square root of 2991378 is about 1729.5600596684. The cubic root of 2991378 is about 144.0866569457.

The spelling of 2991378 in words is "two million, nine hundred ninety-one thousand, three hundred seventy-eight".