426640577 has 4 divisors (see below), whose sum is σ = 465426096. Its totient is φ = 387855060.

The previous prime is 426640567. The next prime is 426640583. The reversal of 426640577 is 775046624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 426640577 - 2¹⁰ = 426639553 is a prime.

It is a super-3 number, since 3×426640577³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426640537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19392743 + ... + 19392764.

It is an arithmetic number, because the mean of its divisors is an integer number (116356524).

Almost surely, 2^426640577 is an apocalyptic number.

It is an amenable number.

426640577 is a deficient number, since it is larger than the sum of its proper divisors (38785519).

426640577 is a wasteful number, since it uses less digits than its factorization.

426640577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38785518.

The product of its (nonzero) digits is 282240, while the sum is 41.

The square root of 426640577 is about 20655.2796398403. The cubic root of 426640577 is about 752.8134782194.

The spelling of 426640577 in words is "four hundred twenty-six million, six hundred forty thousand, five hundred seventy-seven".