1970661628 has 12 divisors (see below), whose sum is σ = 3713939320. Its totient is φ = 909536112.

The previous prime is 1970661619. The next prime is 1970661629. The reversal of 1970661628 is 8261660791.

It is a super-2 number, since 2×1970661628² = 7767014504143220768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1970661629) 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, 18948618 + ... + 18948721.

Almost surely, 2^1970661628 is an apocalyptic number.

It is an amenable number.

1970661628 is a deficient number, since it is larger than the sum of its proper divisors (1743277692).

1970661628 is a wasteful number, since it uses less digits than its factorization.

1970661628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37897356 (or 37897354 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1970661628 is about 44392.1347538052. The cubic root of 1970661628 is about 1253.7300058806.

The spelling of 1970661628 in words is "one billion, nine hundred seventy million, six hundred sixty-one thousand, six hundred twenty-eight".