42979740 has 96 divisors (see below), whose sum is σ = 131906880. Its totient is φ = 10407936.

The previous prime is 42979697. The next prime is 42979753. The reversal of 42979740 is 4797924.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 42979692 and 42979701.

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, 28854 + ... + 30306.

It is an arithmetic number, because the mean of its divisors is an integer number (1374030).

Almost surely, 2^42979740 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 42979740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65953440).

42979740 is an abundant number, since it is smaller than the sum of its proper divisors (88927140).

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

42979740 is a wasteful number, since it uses less digits than its factorization.

42979740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511 (or 1509 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 42979740 is about 6555.8935317773. The cubic root of 42979740 is about 350.2847750347.

The spelling of 42979740 in words is "forty-two million, nine hundred seventy-nine thousand, seven hundred forty".