2947428 has 60 divisors (see below), whose sum is σ = 8415792. Its totient is φ = 892080.

The previous prime is 2947403. The next prime is 2947429. The reversal of 2947428 is 8247492.

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

It is a junction number, because it is equal to n+sod(n) for n = 2947392 and 2947401.

It is not an unprimeable number, because it can be changed into a prime (2947429) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3151 + ... + 3977.

2^2947428 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 2947428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4207896).

2947428 is an abundant number, since it is smaller than the sum of its proper divisors (5468364).

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

2947428 is a wasteful number, since it uses less digits than its factorization.

2947428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854 (or 843 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 2947428 is about 1716.8075023135. The cubic root of 2947428 is about 143.3775213798.

It can be divided in two parts, 2947 and 428, that added together give a cube (3375 = 15³).

The spelling of 2947428 in words is "two million, nine hundred forty-seven thousand, four hundred twenty-eight".