1621200748 has 6 divisors (see below), whose sum is σ = 2837101316. Its totient is φ = 810600372.

The previous prime is 1621200743. The next prime is 1621200781. The reversal of 1621200748 is 8470021261.

It is not an unprimeable number, because it can be changed into a prime (1621200743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202650090 + ... + 202650097.

Almost surely, 2^1621200748 is an apocalyptic number.

It is an amenable number.

1621200748 is a deficient number, since it is larger than the sum of its proper divisors (1215900568).

1621200748 is a wasteful number, since it uses less digits than its factorization.

1621200748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405300191 (or 405300189 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 1621200748 is about 40264.1372439545. The cubic root of 1621200748 is about 1174.7503916446.

The spelling of 1621200748 in words is "one billion, six hundred twenty-one million, two hundred thousand, seven hundred forty-eight".