42342780 has 24 divisors (see below), whose sum is σ = 118559952. Its totient is φ = 11291392.

The previous prime is 42342761. The next prime is 42342799. The reversal of 42342780 is 8724324.

It is an interprime number because it is at equal distance from previous prime (42342761) and next prime (42342799).

It is a super-2 number, since 2×42342780² = 3585822036256800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352797 + ... + 352916.

It is an arithmetic number, because the mean of its divisors is an integer number (4939998).

Almost surely, 2^42342780 is an apocalyptic number.

It is an amenable number.

42342780 is an abundant number, since it is smaller than the sum of its proper divisors (76217172).

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

42342780 is a wasteful number, since it uses less digits than its factorization.

42342780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705725 (or 705723 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 42342780 is about 6507.1330092445. The cubic root of 42342780 is about 348.5457482585.

The spelling of 42342780 in words is "forty-two million, three hundred forty-two thousand, seven hundred eighty".