2991672 has 48 divisors (see below), whose sum is σ = 8328840. Its totient is φ = 969408.

The previous prime is 2991671. The next prime is 2991673. The reversal of 2991672 is 2761992.

2991672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2991671) and next prime (2991673).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2103 + ... + 3225.

2^2991672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2991672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4164420).

2991672 is an abundant number, since it is smaller than the sum of its proper divisors (5337168).

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

2991672 is a wasteful number, since it uses less digits than its factorization.

2991672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172 (or 1165 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 2991672 is about 1729.6450502921. The cubic root of 2991672 is about 144.0913771883.

It can be divided in two parts, 2991 and 672, that added together give a palindrome (3663).

The spelling of 2991672 in words is "two million, nine hundred ninety-one thousand, six hundred seventy-two".