420477557 has 8 divisors (see below), whose sum is σ = 432166656. Its totient is φ = 408902832.

The previous prime is 420477529. The next prime is 420477587. The reversal of 420477557 is 755774024.

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 420477557 - 2⁸ = 420477301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420477517) 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, 21113 + ... + 35870.

It is an arithmetic number, because the mean of its divisors is an integer number (54020832).

Almost surely, 2^420477557 is an apocalyptic number.

420477557 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

420477557 is a deficient number, since it is larger than the sum of its proper divisors (11689099).

420477557 is a wasteful number, since it uses less digits than its factorization.

420477557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57187.

The product of its (nonzero) digits is 274400, while the sum is 41.

The square root of 420477557 is about 20505.5494196083. The cubic root of 420477557 is about 749.1709695787.

The spelling of 420477557 in words is "four hundred twenty million, four hundred seventy-seven thousand, five hundred fifty-seven".