747781650 has 216 divisors, whose sum is σ = 2550332304. Its totient is φ = 155332800.

The previous prime is 747781637. The next prime is 747781687. The reversal of 747781650 is 56187747.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 747781596 and 747781605.

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 107 ways as a sum of consecutive naturals, for example, 241009 + ... + 244091.

It is an arithmetic number, because the mean of its divisors is an integer number (11807094).

Almost surely, 2^747781650 is an apocalyptic number.

747781650 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 747781650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1275166152).

747781650 is an abundant number, since it is smaller than the sum of its proper divisors (1802550654).

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

747781650 is a wasteful number, since it uses less digits than its factorization.

747781650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3126 (or 3111 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The square root of 747781650 is about 27345.5965376512. The cubic root of 747781650 is about 907.6636319011.

The spelling of 747781650 in words is "seven hundred forty-seven million, seven hundred eighty-one thousand, six hundred fifty".