421420902770 has 64 divisors (see below), whose sum is σ = 903252197376. Its totient is φ = 138519426240.

The previous prime is 421420902737. The next prime is 421420902787. The reversal of 421420902770 is 77209024124.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 675302 + ... + 1139681.

It is an arithmetic number, because the mean of its divisors is an integer number (14113315584).

Almost surely, 2^421420902770 is an apocalyptic number.

421420902770 is an abundant number, since it is smaller than the sum of its proper divisors (481831294606).

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

421420902770 is a wasteful number, since it uses less digits than its factorization.

421420902770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815135.

The product of its (nonzero) digits is 56448, while the sum is 38.

Adding to 421420902770 its reverse (77209024124), we get a palindrome (498629926894).

The spelling of 421420902770 in words is "four hundred twenty-one billion, four hundred twenty million, nine hundred two thousand, seven hundred seventy".