102047770 has 80 divisors (see below), whose sum is σ = 219156840. Its totient is φ = 34073600.

The previous prime is 102047747. The next prime is 102047789. The reversal of 102047770 is 77740201.

It can be written as a sum of positive squares in 4 ways, for example, as 69705801 + 32341969 = 8349^2 + 5687^2 .

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2488950 + ... + 2488990.

Almost surely, 2^102047770 is an apocalyptic number.

102047770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102047770 is an abundant number, since it is smaller than the sum of its proper divisors (117109070).

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

102047770 is an equidigital number, since it uses as much as digits as its factorization.

102047770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 102047770 is about 10101.8696289350. The cubic root of 102047770 is about 467.3058016946.

Adding to 102047770 its reverse (77740201), we get a palindrome (179787971).

The spelling of 102047770 in words is "one hundred two million, forty-seven thousand, seven hundred seventy".