1948723290 has 48 divisors (see below), whose sum is σ = 5116869576. Its totient is φ = 514512000.

The previous prime is 1948723261. The next prime is 1948723291. The reversal of 1948723290 is 923278491.

It can be written as a sum of positive squares in 4 ways, for example, as 1948251321 + 471969 = 44139^2 + 687^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1948723291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98101 + ... + 116280.

Almost surely, 2^1948723290 is an apocalyptic number.

1948723290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1948723290 is an abundant number, since it is smaller than the sum of its proper divisors (3168146286).

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

1948723290 is a wasteful number, since it uses less digits than its factorization.

1948723290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214495 (or 214492 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1948723290 is about 44144.3460705898. The cubic root of 1948723290 is about 1249.0602622247.

The spelling of 1948723290 in words is "one billion, nine hundred forty-eight million, seven hundred twenty-three thousand, two hundred ninety".