2742390 has 64 divisors (see below), whose sum is σ = 8363520. Its totient is φ = 626400.

The previous prime is 2742371. The next prime is 2742407. The reversal of 2742390 is 932472.

2742390 is a `hidden beast` number, since 274 + 2 + 390 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1165 + ... + 2615.

It is an arithmetic number, because the mean of its divisors is an integer number (130680).

2^2742390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2742390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4181760).

2742390 is an abundant number, since it is smaller than the sum of its proper divisors (5621130).

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

2742390 is a wasteful number, since it uses less digits than its factorization.

2742390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474 (or 1468 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 2742390 is about 1656.0163042676. The cubic root of 2742390 is about 139.9726136908.

The spelling of 2742390 in words is "two million, seven hundred forty-two thousand, three hundred ninety".