42770397 has 8 divisors (see below), whose sum is σ = 57124800. Its totient is φ = 28464800.

The previous prime is 42770383. The next prime is 42770407. The reversal of 42770397 is 79307724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42770397 - 2⁷ = 42770269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42770327) 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, 10104 + ... + 13697.

It is an arithmetic number, because the mean of its divisors is an integer number (7140600).

Almost surely, 2^42770397 is an apocalyptic number.

It is an amenable number.

42770397 is a deficient number, since it is larger than the sum of its proper divisors (14354403).

42770397 is a wasteful number, since it uses less digits than its factorization.

42770397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24403.

The product of its (nonzero) digits is 74088, while the sum is 39.

The square root of 42770397 is about 6539.9080268762. The cubic root of 42770397 is about 349.7151341964.

The spelling of 42770397 in words is "forty-two million, seven hundred seventy thousand, three hundred ninety-seven".