42780810 has 32 divisors (see below), whose sum is σ = 104861952. Its totient is φ = 11165120.

The previous prime is 42780797. The next prime is 42780811. The reversal of 42780810 is 1808724.

It is a super-2 number, since 2×42780810² = 3660395408512200, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (42780811) 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, 13761 + ... + 16580.

It is an arithmetic number, because the mean of its divisors is an integer number (3276936).

Almost surely, 2^42780810 is an apocalyptic number.

42780810 is an abundant number, since it is smaller than the sum of its proper divisors (62081142).

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

42780810 is a wasteful number, since it uses less digits than its factorization.

42780810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30398.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 42780810 is about 6540.7040905395. The cubic root of 42780810 is about 349.7435127670.

The spelling of 42780810 in words is "forty-two million, seven hundred eighty thousand, eight hundred ten".