42907090 has 16 divisors (see below), whose sum is σ = 77312088. Its totient is φ = 17145216.

The previous prime is 42907049. The next prime is 42907093. The reversal of 42907090 is 9070924.

It can be written as a sum of positive squares in 4 ways, for example, as 42889401 + 17689 = 6549^2 + 133^2 .

It is not an unprimeable number, because it can be changed into a prime (42907093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13054 + ... + 16006.

Almost surely, 2^42907090 is an apocalyptic number.

42907090 is a deficient number, since it is larger than the sum of its proper divisors (34404998).

42907090 is a wasteful number, since it uses less digits than its factorization.

42907090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4413.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 42907090 is about 6550.3503723083. The cubic root of 42907090 is about 350.0872979520.

It can be divided in two parts, 4290 and 7090, that multiplied together give a triangular number (30416100 = T₇₇₉₉).

The spelling of 42907090 in words is "forty-two million, nine hundred seven thousand, ninety".