770032421 has 8 divisors (see below), whose sum is σ = 773700984. Its totient is φ = 766371520.

The previous prime is 770032411. The next prime is 770032451. The reversal of 770032421 is 124230077.

It can be written as a sum of positive squares in 4 ways, for example, as 357739396 + 412293025 = 18914^2 + 20305^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-770032421 is a prime.

It is a super-2 number, since 2×770032421² = 1185899858782242482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770032411) 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, 309635 + ... + 312111.

It is an arithmetic number, because the mean of its divisors is an integer number (96712623).

Almost surely, 2^770032421 is an apocalyptic number.

It is an amenable number.

770032421 is a deficient number, since it is larger than the sum of its proper divisors (3668563).

770032421 is a wasteful number, since it uses less digits than its factorization.

770032421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3831.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 770032421 is about 27749.4580307436. The cubic root of 770032421 is about 916.5785093108.

Adding to 770032421 its reverse (124230077), we get a palindrome (894262498).

The spelling of 770032421 in words is "seven hundred seventy million, thirty-two thousand, four hundred twenty-one".