420700770 has 96 divisors (see below), whose sum is σ = 1305072000. Its totient is φ = 96157152.

The previous prime is 420700769. The next prime is 420700771. The reversal of 420700770 is 77007024.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (420700769) and next prime (420700771).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (420700771) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2670 + ... + 29129.

It is an arithmetic number, because the mean of its divisors is an integer number (13594500).

Almost surely, 2^420700770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420700770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (652536000).

420700770 is an abundant number, since it is smaller than the sum of its proper divisors (884371230).

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

420700770 is a wasteful number, since it uses less digits than its factorization.

420700770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31829 (or 31816 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 27.

The square root of 420700770 is about 20510.9914436138. The cubic root of 420700770 is about 749.3035134088.

Adding to 420700770 its reverse (77007024), we get a palindrome (497707794).

The spelling of 420700770 in words is "four hundred twenty million, seven hundred thousand, seven hundred seventy".