209277428492 has 48 divisors (see below), whose sum is σ = 411788875680. Its totient is φ = 92225548800.

The previous prime is 209277428471. The next prime is 209277428533. The reversal of 209277428492 is 294824772902.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228734 + ... + 686202.

It is an arithmetic number, because the mean of its divisors is an integer number (8578934910).

Almost surely, 2^209277428492 is an apocalyptic number.

209277428492 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a pronic number, being equal to 457468×457469.

It is an amenable number.

209277428492 is a deficient number, since it is larger than the sum of its proper divisors (202511447188).

209277428492 is a wasteful number, since it uses less digits than its factorization.

209277428492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457802 (or 457800 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 209277428492 in words is "two hundred nine billion, two hundred seventy-seven million, four hundred twenty-eight thousand, four hundred ninety-two".