1208215740 has 48 divisors (see below), whose sum is σ = 3387095712. Its totient is φ = 321801216.

The previous prime is 1208215727. The next prime is 1208215769. The reversal of 1208215740 is 475128021.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1208215698 and 1208215707.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39672 + ... + 63168.

It is an arithmetic number, because the mean of its divisors is an integer number (70564494).

Almost surely, 2^1208215740 is an apocalyptic number.

1208215740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1208215740 is an abundant number, since it is smaller than the sum of its proper divisors (2178879972).

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

1208215740 is a wasteful number, since it uses less digits than its factorization.

1208215740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24366 (or 24364 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 1208215740 is about 34759.3978659010. The cubic root of 1208215740 is about 1065.0782018443.

The spelling of 1208215740 in words is "one billion, two hundred eight million, two hundred fifteen thousand, seven hundred forty".