42980640 has 96 divisors (see below), whose sum is σ = 136515456. Its totient is φ = 11366400.

The previous prime is 42980633. The next prime is 42980647. The reversal of 42980640 is 4608924.

It is an interprime number because it is at equal distance from previous prime (42980633) and next prime (42980647).

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (42980647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72184 + ... + 72776.

It is an arithmetic number, because the mean of its divisors is an integer number (1422036).

Almost surely, 2^42980640 is an apocalyptic number.

42980640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42980640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68257728).

42980640 is an abundant number, since it is smaller than the sum of its proper divisors (93534816).

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

42980640 is a wasteful number, since it uses less digits than its factorization.

42980640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 754 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 42980640 is about 6555.9621719470. The cubic root of 42980640 is about 350.2872200169.

The spelling of 42980640 in words is "forty-two million, nine hundred eighty thousand, six hundred forty".